An engine is used on a job requiring \(110 \mathrm{~kW}\) BP. The mechanical efficiency of the engine is \(80 \%\) and engine consumes \(50 \mathrm{~kg} / \mathrm{hr}\) of fuel. A design improvement is made which reduces the engine friction by \(5 \mathrm{~kW}\). If indicated thermal efficiency remains the same, how many \(\mathrm{kg}\) of fuel per hour will be saved?